cleek lceek celek eclek lecek elcek cleek lceek celek eclek lecek elcek ceelk ecelk ceelk ecelk eeclk eeclk leeck eleck leeck eleck eelck eelck cleke lceke celke eclke lecke elcke clkee lckee cklee kclee lkcee klcee cekle eckle ckele kcele ekcle kecle lekce elkce lkece klece eklce kelce cleke lceke celke eclke lecke elcke clkee lckee cklee kclee lkcee klcee cekle eckle ckele kcele ekcle kecle lekce elkce lkece klece eklce kelce ceekl ecekl ceekl ecekl eeckl eeckl cekel eckel ckeel kceel ekcel kecel cekel eckel ckeel kceel ekcel kecel eekcl eekcl ekecl keecl ekecl keecl leekc elekc leekc elekc eelkc eelkc lekec elkec lkeec kleec eklec kelec lekec elkec lkeec kleec eklec kelec eeklc eeklc ekelc keelc ekelc keelc
Note: these 'words' (valid or invalid) are all the permutations of the word cleek. These words are obtained by scrambling the letters in cleek.